** Description changed: From BIOS, there is front USB port disable function. It is supposed the option in BIOS can disable USB port and due to AMD chip limitation, it need OS’s cowork. Otherwise the USB disable function will be invalid when resuming from S3 or reinsert USB device. + + === SRU Justification === + + [Impact] + In BIOS, there is front USB port disable function. + It is supposed the option in BIOS can disable USB port, but due to AMD chip's + limitation, it needs OS’s cowork. Otherwise the USB disable function will + be invalid when resuming from S3 or reinsert USB device. + + [Fix] + After checking with Windows, we found there are 2 bits that are default on + in Ubuntu is disabled in Windows. They are + #define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */ + #define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */ + So, this patch introduce a quirk to not setup the wakeup bits only for + AMD USB chips. + + [Test Case] + Verified on the machine has this issue, and confirm this patch works. + + [Regression Potential] + This patch only affects the listed USB ID, and we don't cert this kind of + wakeup method, so should have no regression concerns. + Wake up from USB device is still working, and the patch behavior is confirmed by + the project lead, Tsai, Nicholas, from AMD in the discussion thread[1]. + + [Misc] + This patch is accepted by the maintainer but still not shown up in any git tree + yet. The discussion thread can be found here[1]. To fit the project schedule, + we need this commit in our kernel as soon as possbile, and can't wait to + next SRU release cycle. + + 1. https://www.spinics.net/lists/linux-usb/msg157789.html
** Changed in: hwe-next Importance: Undecided => High ** Changed in: linux (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1695216 Title: Can't disable USB port from BIOS Status in HWE Next: In Progress Status in linux package in Ubuntu: In Progress Bug description: From BIOS, there is front USB port disable function. It is supposed the option in BIOS can disable USB port and due to AMD chip limitation, it need OS’s cowork. Otherwise the USB disable function will be invalid when resuming from S3 or reinsert USB device. === SRU Justification === [Impact] In BIOS, there is front USB port disable function. It is supposed the option in BIOS can disable USB port, but due to AMD chip's limitation, it needs OS’s cowork. Otherwise the USB disable function will be invalid when resuming from S3 or reinsert USB device. [Fix] After checking with Windows, we found there are 2 bits that are default on in Ubuntu is disabled in Windows. They are #define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */ #define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */ So, this patch introduce a quirk to not setup the wakeup bits only for AMD USB chips. [Test Case] Verified on the machine has this issue, and confirm this patch works. [Regression Potential] This patch only affects the listed USB ID, and we don't cert this kind of wakeup method, so should have no regression concerns. Wake up from USB device is still working, and the patch behavior is confirmed by the project lead, Tsai, Nicholas, from AMD in the discussion thread[1]. [Misc] This patch is accepted by the maintainer but still not shown up in any git tree yet. The discussion thread can be found here[1]. To fit the project schedule, we need this commit in our kernel as soon as possbile, and can't wait to next SRU release cycle. 1. https://www.spinics.net/lists/linux-usb/msg157789.html To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1695216/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
